1. From the Division of Cardiology (M.G.M.), Department of Research Design and Biostatistics (A.K.), Division of Nephrology (S.W.T.), Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada; Department of Family Medicine (M.G.), Memorial University of Newfoundland, St. John’s, Newfoundland and Labrador, Canada; Department of Family Medicine (M.D.), McGill University, Montreal, Quebec, Canada; Department of Family Practice (J.K.), University of British Columbia, Vancouver, British Columbia, Canada.